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The protocol implements ANSI X3.28 communication. The communication was verified against the SPIO 500M communication unit of ABB's SPACOM protectin and control system.
The D2000 KOM process process periodically reads all configured I/O tags (see the Read Data Timeout parameter). The communication unit spontaneously sends events (Events) that can also cause the I/O tag of DI type to be set to 0 or 1 (see the I/O tag configuration).
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Communication line configuration
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Station configuration
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- Communication protocol: "ABB SRIO X3.28".
- Station address: a number in the range of 0 - 255.
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Dialóg Communication station - Protocol parameters tab.
The parameters influence some optional protocol parameters. The following protocol line parameters can be used:
Table 1
| Parameter | Description | Unit | Default value |
| The address of |
Master LOM Process| D2000 KOM process) is a number in the range 0 to 255. | - | 0 |
|
Number | The number of request retries in case of a communication failure. | - | 3 |
| First waiting |
on | for a response after sending the request. | ms | 100 ms. |
|
Delay between reading | The delay between individual readings of the response until its completing. | ms | 100 ms. |
| Retry count of response reading until its completing. | - | 50 |
| Activate a permanent passive mode (Scan only) without sending requests and only processing received messages. | YES/NO | NO |
| Full communication monitoring. It enables to show the I/O tag values and other debug information. | YES/NO | NO |
|
Start The start address of the block of DI data (digital inputs). Blok's length is 500 words, data are 16-bit binary numbers.
The parameter is used only for communication logs and analysis. | - | 0 |
|
Start block of the block of DO data (digital outputs). Blok's length is 250 words, data are 16-bit binary numbers.
The parameter is used only for communication logs and analysis. | - | 500 |
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Start block of the block of EV data. Blok's length is 250 words, data are 16-bit binary numbers with timestamps.
The parameter is used only for communication logs and analysis. | - | 750 |
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Start block of the block of AI data (analog inputs). Blok's length is 500 words, data are 32-bit binary numbers.
The parameter is used only for communication logs and analysis. | - | 1000 |
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Start block of the block of AO data (analog outputs). Blok's length is 500 words, data are 32-bit binary numbers.
The parameter is used only for communication logs and analysis. | - | 1500 |
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Start address | The start address of Time Write data where time is written during time synchronization. Data's length is 9 words, data is BCD encoded. | - | 2300 |
|
Start address | The start address of Event |
Data| data. The data is 4 words in length, the data |
is binary | binary numbers (containing 10-bit SPACOM Unit Number, 7-bit Channel Number and 5-bit Event Number which can be specified in the I/O tag configuration) with a time stamp. | - | 2400 |
| The size of the block of data specified in the BLOCK_READ data request sent by the KOM process (2-244 bytes). | bytes | 100 |
|
Period | A period (10-1440 minutes) in which the KOM process performs readout of all data (integrity readout). | min | 15 |
Diagnostic Request Timeout |
Period | A period (10-60 sekúnd) in which the KOM process sends a diagnostic request (DIAG_LOOP) to verify line functionality. | s | 5 |
String containing the protocol parameters is defined as follows:
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I/O tag configuration
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Possible value type: Ai, Di.
I/O tag address items:
- Word Address: 16-bit data address in device memory (0-65535) used during readout of all data (see Read Data Timeout).
- SPACOM Unit (Di tags only): optional 10-bit address of SPA Unit (0-1023) within the SPACOM system.
- Channel (Di tags only): optional 7-bitová adresa SPA Channel (0-127) within the SPACOM system.
- EventNr 0->1 (Di tags only): optional 6-bit number of Event (0-63), that will cause transition to value True.
- EventNr 1->0 (Di tags only): optional 6-bit number of Event (0-63), that will cause transition to value False.
Note: Optional address items SPACOM Unit, Channel, EventNr 0->1, EventNr 1->0 are used when the Di I/O tag§s value is to be set after the arrival of Event Data.
Changes and modifications
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